205011 ⎘
Details of cathode-ray tubes or of electron-beam tubes of the types covered by group; Electrodes; Screens; Mounting, supporting, spacing or insulating thereof; Screens on or from which an image or pattern is formed, picked up, converted or stored; Photoelectric screens; Charge-storage screens; Charge-storage screens using secondary emission, e.g. for supericonoscope for writing and reading of charge pattern on opposite sides of the target, e.g. for superorthicon